Ever since I got my iPod around January (with 1.12 firmware I think), the clock has been changing randomly every few days or so. Sometimes it seems like the clock literally froze and picked up where it left off, so it might be just a day behind, and other times it might be a completely different month. As far as I'm concerned, I don't even want it to be off by a minute. Why does this keep happening? What could I do to fix it?